The Minister of Customs is a minister in the New Zealand Government appointed by the Prime Minister to be in charge of matters of border control, international trade and travel and the collection of import duties and taxes to New Zealand. The minister is responsible for the New Zealand Customs Service which is the oldest government department in New Zealand.

Ministers in the New Zealand Government are members of Parliament (MPs) who hold ministerial warrants from the Crown to perform certain functions of government. This includes formulating and implementing policies and advising the governor-general. Ministers collectively make up the executive branch of the New Zealand state. The governor-general is obliged to follow the advice of the prime minister on the appointment and dismissal of ministers.